There's a vast world below us that most of you know nothing about. How many of you have actually ventured down into the cavernous sewer pipes below your city to have a look? Sure, it's not the most aromatherapy-friendly destination, but if you're looking for a mutated monster hell-bent on taking over humankind, it's probably your best bet. Check out our list of the best stinky crawlies below, which is flush with sewer creatures.

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C.H.U.D.: This is probably one of the best known sewer monster movies, which is what happens when you bury nuclear waste under New York City. Luckily, a cop, a reporter, his girlfriend, and a street bum band together to fight it. And if you've always wondered what it stood for, you can quit: "Cannibalistic Humanoid Underground Dweller". But wait a minute, one of the containers in the film also says "Contamination Hazard Urban Disposal" on it. Thanks for making it confusing filmmakers. It's also the name of a movie website, where it stands for "Cinematic Happenings Under Development," and they've lovingly named their message boards the "Sewer Chewer".

The Blob: In the 1988 remake of the Steve McQueen classic, a meteorite falls to Earth that contains a strange visitor who looks like, well... a blob of jelly. It soon starts attacking people and then retreats into the sewer system, where it can roam free and wreak havoc. (In the original film, it doesn't make use of the sewers for some reason). Written by Frank Darabont, and starring Kevin Dillion, it faded quickly into the bad remake file.

Them: In this 1954 film, radiation causes ants to grow to enormous size and seek out somewhere homey to set up a new nest. Namely, the Los Angeles sewer system. The ending of the film promises future atomic horrors, and it went on to become Warner Bros highest grossing film for that year. Apparently mutated ants + the sewer = big money.

Weird Science: While it didn't exactly come directly from the sewers, Lisa uses her science-magic powers to turn Wyatt's annoying older brother Chet into a shit monster. Literally. He becomes gross ball of farting poop until he finally apologizes to Wyatt and Lisa de-mutates him at the end.

Dogma: In Kevin Smith's religious comedy, the Golgothan is the excrement monster that Jason Lee sends after Jay and Silent Bob. He's made up of all the evil shit from all over the world, and even has his own action figure that farts when you squeeze it. Unlike the Charmin.

Monsturd: We shit you not (sorry), this is the actual title of this 2003 direct to video gem. A serial killer escapes from jail and gets chased into the sewers, where he falls into a pool of chemicals. As you'd expect, the chemicals transform him into a half-human, half-poop monster who goes on a killing spree.